I miss my old Nokia 1200. You could beat somebody to death with it. Instead of half a brick behind your wheel when changing a flat, use the Nokia. Need to anchor a boat? Put the Nokia in a plastic bag, tie it to a rope and chuck it over the side. If the rose's too short you risk sinking the boat.
Now that was a useful phone. These newfangled things couldn't stop a skateboard
I have read in one of the published articles about the company that one dev said it took six months to change an icon or its color on Symbian OS. Had to get it signed off from so many different people, that the devs just didn't bother.
Their biggest mistake was their ex-CEO telling the press that using Android on a phone is "like peeing in your pants for warmth".
I think Google was at that stage still contemplating if they wanted to continue with Android, but after the words of the Nokia ex-CEO, they said "Challenge accepted!" and started planning their revenge.